Today, most Christian denominations are neutral about biblical male circumcision, neither requiring it nor forbidding it. Circumcision was controversial during the period of Early Christianity (before 325) and the first Church Council in Jerusalem (c.50) declared that circumcision was not necessary for new gentile converts (a record of the council is found in Acts 15). But it is customary among the Coptic, Ethiopian, and Eritrean Orthodox Churches, and also some other African churches.[25] Some Christian churches in South Africa oppose circumcision, viewing it as a pagan ritual, while others, including the Nomiya church in Kenya,[25][26] require circumcision for membership. Some participants in focus group discussions in Zambia and Malawi said that Christians should practice circumcision because Jesus was circumcised and the Bible teaches the practice.
"Scène de la circoncision de Jésus", a sculpture in the Cathedral of Chartres.
While Jesus' circumcision was recorded as having been performed in accordance with Torah requirements in Luke 2:21, according to the Acts of the Apostles, chapter 15, the leaders of the Christian Church at the Council of Jerusalem rejected circumcision as a requirement for Gentile converts, possibly the first act of differentiation of Early Christianity from its Jewish roots,[27] see also list of events in early Christianity. Paul of Tarsus, who called himself Apostle to the Gentiles, attacked the practice, but not consistently, for example in one case he personally circumcised Timothy "because of the Jews" that were in town (Timothy had a Jewish Christian mother but a Greek father Acts 16:1–3).[28] He also appeared to praise its value in Rom 3:1–2, hence the topic of Paul of Tarsus and Judaism is still debated. Paul argued that circumcision no longer meant the physical, but a spiritual practice (Rom 2:25–29). And in that sense, he wrote 1 Cor 7:18: "Is any man called being circumcised? let him not become uncircumcised"—probably a reference to the practice of epispasm.[29] Paul was already circumcised ("on the eighth day", Phil 3–5) when he was "called". He added: "Is any called in uncircumcision? let him not be circumcised", and went on to argue that circumcision did not matter: "Circumcision is nothing and uncircumcision is nothing. Keeping God's commands is what counts (1 Cor 7:19)."
Like I said, Christianity SUPPORTS circumcision, but it's controversial.